Spring Data Redis 不初始化 RestTemplate

Question

我已将两个 Spring Data 模块集成到我的应用程序中:Spring Data MongoDB 和 Spring Data Redis。

虽然 Spring Data MongoDB 模块工作得很好，但由于与连接 RestTemplate bean 相关的问题，我在使用 Spring Data Redis 时遇到了困难，而 RestTemplate bean 是与 Redis 交互所必需的。

一旦 Spring Boot 应用程序启动，我就会遇到以下错误:

*************************** APPLICATION FAILED TO START

---

Description:

Parameter 0 of constructor in com.github.wjoz.talkative.messageService.repository.redis.impl.RedisMessageRepositoryImpl required a bean of type 'org.springframework.data.redis.core.RedisTemplate' that could not be found. - Bean method 'redisTemplate' in 'RedisAutoConfiguration.RedisConfiguration' not loaded because @ConditionalOnMissingBean (names: redisTemplate; SearchStrategy: all) found bean 'redisTemplate'

Action:

Consider revisiting the conditions above or defining a bean of type 'org.springframework.data.redis.core.RedisTemplate' in your configuration.

Spring 说 bean 无法实例化，但是，当我在 redisTemplate() 处调试时，bean 在 BeanFactory(IoC 容器)中创建并实例化，因为执行在那里停止。

我有两个 Spring Data 模块，因此 Spring Data 正在进入严格的存储库配置模式，正如日志中提到的:

Multiple Spring Data modules found, entering strict repository configuration mode!

对于 Spring Data Redis，我既不使用 Repository 也不使用 CrudRepository 接口(interface)，而是使用普通的 @Repository 注释来实现它，因为这里提到的问题: Repositories - Multiple Modules

我认为 Spring Boot 启动器中的某个地方可能存在版本冲突的问题。但我无法弄清楚。

提前致谢。

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.github.wjoz</groupId>
<artifactId>talkative-message-service</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<name>talkative-message-service</name>

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <spring.version>5.0.1.RELEASE</spring.version>
    <spring.security.jwt.version>1.0.7.RELEASE</spring.security.jwt.version>
    <spring.cloud.starter.version>1.2.3.RELEASE</spring.cloud.starter.version>
    <spring.cloud.eureka.server.version>1.3.4.RELEASE</spring.cloud.eureka.server.version>
    <oauth.version>2.0.12.RELEASE</oauth.version>
    <modelmapper.version>0.7.7</modelmapper.version>
    <junit.version>4.12</junit.version>
    <h2.version>1.4.193</h2.version>
    <log4j2.version>2.8.1</log4j2.version>
    <jackson.version>2.8.7</jackson.version>
    <apachecommons.version>2.5</apachecommons.version>
</properties>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.8.RELEASE</version>
</parent>

<dependencies>
     <!-- Setup Spring Boot -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <!-- Setup Spring MVC & REST, use Embedded Tomcat -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
    </dependency>

    <!-- Spring Cloud starter -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter</artifactId>
        <version>${spring.cloud.starter.version}</version>
    </dependency>

    <!-- Spring Data Redis -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>

    <!-- Spring Data MongoDB -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>

    <!-- Spring Boot Starter Security -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>

    <!-- Spring Boot Starter Security OAuth 2 -->
    <dependency>
        <groupId>org.springframework.security.oauth</groupId>
        <artifactId>spring-security-oauth2</artifactId>
        <version>${oauth.version}</version>
    </dependency>

    <!-- Spring Test Framework -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <!-- Spring Security module for JSON Web Token support -->
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-jwt</artifactId>
        <version>${spring.security.jwt.version}</version>
    </dependency>

    <!-- Eureka for service registration -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-eureka-server</artifactId>
        <version>${spring.cloud.eureka.server.version}</version>
    </dependency>

    <!-- ModelMapper for DTO/Domain object conversion -->
    <dependency>
        <groupId>org.modelmapper</groupId>
        <artifactId>modelmapper</artifactId>
        <version>${modelmapper.version}</version>
    </dependency>

    <!-- JUnit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>${junit.version}</version>
        <scope>test</scope>
    </dependency>

    <!-- Embedded Redis for integration tests -->
    <dependency>
        <groupId>it.ozimov</groupId>
        <artifactId>embedded-redis</artifactId>
        <version>0.7.1</version>
        <scope>test</scope>
    </dependency>

    <!-- Spring Boot Hot Swap -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>

    <!-- Log4j 2 API -->
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>${log4j2.version}</version>
    </dependency>

    <!-- Log4j 2 Core -->
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>${log4j2.version}</version>
    </dependency>

    <!-- Log4j 2 YAML support -->
    <dependency>
        <groupId>com.fasterxml.jackson.dataformat</groupId>
        <artifactId>jackson-dataformat-yaml</artifactId>
        <version>${jackson.version}</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>${jackson.version}</version>
    </dependency>

    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>${apachecommons.version}</version>
    </dependency>

</dependencies>

<build>
    <resources>
        <!--<resource>-->
        <!--<directory>src/main/resources</directory>-->
        <!--<filtering>true</filtering>-->
        <!--<excludes>-->
        <!--<exclude>*.jks</exclude>-->
        <!--</excludes>-->
        <!--</resource>-->
    </resources>
    <plugins>
        <!-- Package as an executable jar -->
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <addResources>true</addResources>
            </configuration>
        </plugin>
    </plugins>
</build>

BaseAppConfig - 配置类

    @Configuration
    @Profile({ApplicationProfiles.DEVELOPMENT, ApplicationProfiles.PRODUCTION})
    @EnableMongoRepositories(basePackages = Packages.MONGO_REPOSITORY)
    public class BaseAppConfig {

        /**
         * Configures the Java client for Redis.
         * @return the Java Redis client object
         */
        @Bean
        public JedisConnectionFactory jedisConnectionFactory() {
            return new JedisConnectionFactory();
        }

        /**
         * Provides the central class of the Redis module for Redis interactions.
         * @return the Redis interaction class
         */
        @Bean
        public RedisTemplate<String, Object> redisTemplate() {
            RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
            redisTemplate.setConnectionFactory(jedisConnectionFactory());
            return redisTemplate;
        }
    }

MongoMessageRepository

    public interface MongoMessageRepository extends CrudRepository<Message, String> {

    }

RedisMessageRepositoryImpl - 我尝试 Autowiring RestTemplate

@Repository
public class RedisMessageRepositoryImpl implements RedisMessageRepository {

    private static final String KEY = "Message";
    private final RedisTemplate<String, Message> redisTemplate;
    private HashOperations<String, String, Message> hashOperations;

    @Inject
    private RedisMessageRepositoryImpl(RedisTemplate<String, Message> redisTemplate) {
        this.redisTemplate = redisTemplate;
    }

    @Override
    public void save(Message message) {
        hashOperations.put(KEY, message.getId(), message);
    }
}

更新: 我添加了相当简单的主 MessageServer 类:

@EnableDiscoveryClient
@SpringBootApplication(scanBasePackages = Packages.COMPONENT_ROOT)
@EnableFeignClients
public class MessageServer {
    public static void main(String[] args) {
        SpringApplication.run(MessageServer.class, args);
    }
}

Answer 1

好的，我已经找出问题的原因了。 该 bean 已在 IoC 容器中实例化，但由于我的两个愚蠢错误，在尝试将其自动连接到 RedisMessageRepositoryImpl 时出现了问题:

首先，我不小心在

中使用了private修饰符而不是public

 @Inject
    private RedisMessageRepositoryImpl(RedisTemplate<String, Message> redisTemplate) {
        this.redisTemplate = redisTemplate;
    }

因此，即使使用 @Repository 标记，bean 本身也无法实例化。

我必须删除 RedisTemplate 的通用声明:

private final RedisTemplate<String, Message> redisTemplate;

至

private final RedisTemplate redisTemplate;

通过这种方式，bean 现在可以 Autowiring ，没有任何问题，就像在 IntelliJ 中发现的那样，一切都很好。